Hrysannthos was educated at Newington College completing is Higher School Certificate in 2013.

[4] He was part of Australian team which finished at eighth position in the 2015 FINA Youth World Championships.

[6] He was part of the Australian team which won silver at the 2018 FINA Men's Water Polo World League.

He played a key role in helping Sydney University Lions in winning the 2018 Australian Waterpolo League title whereas he saved three penalties in the final.

In the playoff series against Olympiacos CFP, Hrysanthos helped to win through a penalty shootout.